EP1180585A1 - Précédé et dispositif pour le retraitement catalytique des gaz d'échappement d'un moteur a combustion interne - Google Patents

Précédé et dispositif pour le retraitement catalytique des gaz d'échappement d'un moteur a combustion interne Download PDF

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Publication number
EP1180585A1
EP1180585A1 EP01116907A EP01116907A EP1180585A1 EP 1180585 A1 EP1180585 A1 EP 1180585A1 EP 01116907 A EP01116907 A EP 01116907A EP 01116907 A EP01116907 A EP 01116907A EP 1180585 A1 EP1180585 A1 EP 1180585A1
Authority
EP
European Patent Office
Prior art keywords
catalytic
exhaust gas
catalyst device
engine
catalyst
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01116907A
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German (de)
English (en)
Other versions
EP1180585B1 (fr
Inventor
Paul Küper
Tom Brahner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Audi AG
Dr Ing HCF Porsche AG
Volkswagen AG
Original Assignee
Bayerische Motoren Werke AG
Audi AG
Dr Ing HCF Porsche AG
Volkswagen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG, Audi AG, Dr Ing HCF Porsche AG, Volkswagen AG filed Critical Bayerische Motoren Werke AG
Publication of EP1180585A1 publication Critical patent/EP1180585A1/fr
Application granted granted Critical
Publication of EP1180585B1 publication Critical patent/EP1180585B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0835—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/204—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using an exhaust gas igniter, e.g. a spark or glow plug, without introducing fuel into exhaust duct
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/16—Exhaust treating devices having provisions not otherwise provided for for reducing exhaust flow pulsations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2270/00—Mixing air with exhaust gases
    • F01N2270/04—Mixing air with exhaust gases for afterburning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a method and an apparatus for catalytic Exhaust gas aftertreatment of the exhaust gas of an internal combustion engine.
  • WO 93/07365 describes a for rapid heating of a catalytic system Exhaust gas afterburning methods have been proposed.
  • the corresponding System consists of two catalysts, between which a combustion chamber with a Ignition aid is arranged. After the cold start of the engine, the engine is operated rich, upstream of the catalyst system, secondary air is mixed in and the combustible exhaust gas / air mixture is ignited in the combustion chamber and burned as completely as possible. The Heat of reaction is used to quickly heat up the catalyst. During the heating phase the exhaust gas in the combustion chamber is much warmer than the incoming exhaust gas.
  • the main disadvantage of the system is that after the heating phase the system again can cool down and the catalyst temperature drop below the light-off temperature until the incoming exhaust gas is warm enough to keep the entire system above to maintain the light-off temperature.
  • Another disadvantage is that necessary strong enrichment the raw emissions are increased significantly and that up to ignite the exhaust gas raw exhaust gas without conversion into the environment.
  • an HC adsorber was proposed instead of the first catalyst to be placed in front of the combustion chamber.
  • the second carrier cools after the heating phase and loses its activity for a certain period of time until the inflowing exhaust gas has heated the system up to operating temperature again.
  • Farther passes in the desorption phase HC from the adsorber without oxidation in the second Monoliths in the area.
  • the object of the present invention is to provide an improved method and improved device for catalytic exhaust gas aftertreatment of the exhaust gas To create internal combustion engine, with a faster and more efficient heating of the Catalyst system is possible.
  • the inventive method with the features of claim 1 and the corresponding device according to claim 13 have the advantage that by position away from the motor an optimal mixing of the reactive or ignitable Exhaust gas can be reached until ignition and a saving in heating energy can take place because of the engine exhaust gas heating near the engine Main catalytic converter reaches its operating temperature faster than the engine away Starting catalyst.
  • the invention enables the catalytic exhaust gas detoxification system of Internal combustion engines.
  • the catalyst system consists of a close-coupled engine Main catalytic converter and a starting catalytic converter arranged remote from the engine. This creates air supplied to the exhaust gas and by spark ignition before the catalytic converter away from the engine Brought reaction.
  • the heating measure is in the warm-up phase Internal combustion engine operated because the catalysts are not sufficient during this time Temperature for the oxidation of, for example, hydrocarbons and carbon monoxide and to reduce nitrogen oxides, for example.
  • the peculiarity of the Systems lies in the separation of the function for rapid heating away from the engine Starting catalytic converter and the function of a main catalytic converter, due to its close proximity to the engine Function reaches the "light-off" or light-off temperature at an early stage. This separation enables a shortening of the heating time, so that damage to the starting catalyst is avoided by the heating measure.
  • the heating measure has a first phase the exothermic reaction for heating the second catalyst device to above Starting temperature on.
  • the heating measure has a second one Phase without the exothermic reaction to cool down to the light-off temperature, the engine being operated stoichiometrically or lean.
  • the heating time of the hot measure can be the thermal Reduce stress on the second catalytic converter device.
  • the mixture is adjusted in such a way that that the exhaust gas coming from the engine contains combustible components, and the Exhaust gas with flammable components in the exhaust system is supplied to air to obtain an ignitable mixture.
  • the air is at one position fed upstream of the first catalyst device.
  • the air is at one position fed downstream of the first catalyst device. This has the advantage that the first catalyst device better protected against unwanted combustion is.
  • At least two bends are provided in the exhaust gas flow. This ensures a good one Mixing the combustible components with the secondary air.
  • the second Catalyst device set up a reaction chamber in which the exothermic reaction is initiated by means of an ignition device, preferably an annealing device.
  • This Ignition device can e.g. be a glow plug or a special spark plug.
  • a catalytically coated glow plug is particularly advantageous, as a result of which Let ignition temperature and ignition energy lower.
  • the ignition device in the arranged essentially centrally in the reaction chamber.
  • the second catalyst device provided with a multi-component integral coating, which is a catalytic and has an adsorbent component for hydrocarbons.
  • the temperature profile in the second catalyst device is such that the temperature window between the beginning of desorption and the beginning of the catalytic Implementation is closed.
  • the HC adsorber can on the one hand, the HC portion from the exhaust gas can be used for exhaust gas afterburning, on the other hand, the unburned portion in the subsequent HC adsorber temporarily stored and at the same time during desorption on the integral coating oxidized.
  • the catalytic converter near the engine heats up quickly and reaches its Starting temperature before the integral coating cools down.
  • upstream immediately before the Reaction chamber of the second catalyst device a third catalyst device intended.
  • the third catalyst device provided with a multi-component integral coating, which is a catalytic and has an adsorbent component for hydrocarbons.
  • the reaction chamber is cylindrical executed. This allows an optimal design of the flame front to be achieved.
  • 1 denotes an internal combustion engine, 10 a first Catalyst device, 20 a second catalytic device, 5 an exhaust pipe at least two deflections, A and B air supply positions, C an ignition device, 19 a reaction chamber, 15 a tube for air supply and 18a, b slots.
  • Fig. 1 shows a schematic representation of a device according to a first preferred embodiment of the present invention.
  • a first catalyst device 10 is in arranged in the immediate vicinity of the internal combustion engine 1. This first Catalyst device 10 is the main catalyst.
  • a second catalytic converter device 20 Downstream of the first catalyst device 10 and connected by the Exhaust line 5 is a second catalytic converter device 20 with an immediately preceding one arranged combustion chamber 19 is provided. There is one in the combustion chamber central location an ignition device C.
  • the reaction chamber 19 during the warm-up phase an exothermic reaction to heat the second Allow catalyst device 20 to run to its light-off temperature.
  • the ignition device C and the secondary air supply can be switched off and the ⁇ value can also be any according to the engine conditions can be set.
  • the heating time can also be shortened by switching off the heating the heat stored in the second catalytic converter to bridge the remaining time until full starting of the main catalytic converter near the engine is used.
  • FIG. 2 shows an enlarged detail of the air introduction device of the device according to Fig. 1.
  • an example of how the secondary air is shown can expediently be introduced into the exhaust line 5.
  • the Tube 15 has on its jacket slots 18a, b through which the air from the tube 15 can exit and get into the exhaust pipe 5, where it is with the passing exhaust gas mixed.
  • the position and number of slots 18a, 18b are adapted or optimized.
  • Fig. 3 shows a schematic representation of a device according to a second preferred embodiment of the present invention.
  • a third catalyst device 30 is provided, which serves, pulsations caused by the reaction chamber 19 during the warm-up phase to prevent.
  • this second embodiment is a two-component Integral coating provided in the second catalyst device 20, which on the one hand an HC-adsorbing component and on the other hand a catalytic Has component for HC, so that already occurring immediately after starting Hydrocarbons are bound first and then after reaching the Starting temperature of the second catalyst device 30 catalytically converted become.
  • the air supply can be anywhere between the first and second Catalyst take place. Any ignition device can also be used.
  • the reaction chamber is also optional.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
EP01116907A 2000-08-09 2001-07-11 Précédé et dispositif pour le retraitement catalytique des gaz d'échappement d'un moteur a combustion interne Expired - Lifetime EP1180585B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10038724A DE10038724A1 (de) 2000-08-09 2000-08-09 Verfahren und Vorrichtung zur katalytischen Abgasnachbehandlung des Abgases einer Brennkraftmaschine
DE10038724 2000-08-09

Publications (2)

Publication Number Publication Date
EP1180585A1 true EP1180585A1 (fr) 2002-02-20
EP1180585B1 EP1180585B1 (fr) 2004-01-28

Family

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Family Applications (1)

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EP01116907A Expired - Lifetime EP1180585B1 (fr) 2000-08-09 2001-07-11 Précédé et dispositif pour le retraitement catalytique des gaz d'échappement d'un moteur a combustion interne

Country Status (3)

Country Link
US (1) US6523342B2 (fr)
EP (1) EP1180585B1 (fr)
DE (2) DE10038724A1 (fr)

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US6934622B2 (en) * 2003-11-04 2005-08-23 Detroit Diesel Corporation Internal combustion engine with NOx adsorber
DE102004045540A1 (de) * 2004-09-21 2006-03-23 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine mit einem Katalysator
JP2006199175A (ja) * 2005-01-21 2006-08-03 Yamaha Motor Co Ltd スノーモービル
JP2006199176A (ja) * 2005-01-21 2006-08-03 Yamaha Motor Co Ltd スノーモービルの排気装置
US7590481B2 (en) * 2005-09-19 2009-09-15 Ford Global Technologies, Llc Integrated vehicle control system using dynamically determined vehicle conditions
DE102019133509A1 (de) * 2019-12-09 2021-06-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zum Betreiben einer Abgasanlage und Abgasanlage
US11428181B2 (en) * 2020-03-25 2022-08-30 Cummins Inc. Systems and methods for ultra-low NOx cold start warmup control and fault diagnosis
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US11905900B1 (en) * 2022-12-15 2024-02-20 Saudi Arabian Oil Company Exhaust system combustion for rapid catalyst heating

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DE2129023A1 (de) * 1971-06-11 1972-12-28 Volkswagenwerk Ag, 3180 Wolfsburg Anordnung zur Abgasreinigung
DE2254895A1 (de) * 1971-11-10 1973-05-17 Engelhard Min & Chem Verfahren zur behandlung von motorabgasen
US5457957A (en) * 1993-03-17 1995-10-17 Pierburg Gmbh Method and apparatus for heating a catalytic converter upon cold engine starting
US5802844A (en) * 1995-06-30 1998-09-08 Chrysler Corporation After-burner heated catalyst system and associated control circuit and method

Also Published As

Publication number Publication date
US20020023429A1 (en) 2002-02-28
DE50101383D1 (de) 2004-03-04
EP1180585B1 (fr) 2004-01-28
DE10038724A1 (de) 2002-02-21
US6523342B2 (en) 2003-02-25

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